In this special episode our topic is a little less about engineering and a little more about urban planning. We take a journey back in time to the now demolished Kowloon Walled City, a dense settlement occupying a small portion of British-controlled Hong Kong. The small territory remained officially under China\u2019s control, but Britain\u2019s control of the island of Hong Kong left China with little influence, and the abandoned administrative centre would grow organically into a free anarchist state.